linux-kernel - Re: [PATCH v3 13/18] ARM: dts: qcom: add opp table for cpu and l2 for ipq8064

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Message-ID: <YlXcHJminisFjobl@builder.lan>
Date:   Tue, 12 Apr 2022 15:07:56 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Ansuel Smith <ansuelsmth@...il.com>
Cc:     Andy Gross <agross@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jonathan McDowell <noodles@...th.li>
Subject: Re: [PATCH v3 13/18] ARM: dts: qcom: add opp table for cpu and l2
 for ipq8064

On Wed 09 Mar 13:01 CST 2022, Ansuel Smith wrote:

> Add opp table for cpu and l2 cache. While the current cpufreq is
> the generic one that doesn't scale the L2 cache, we add the l2
> cache opp anyway for the sake of completeness. This will be handy in the
> future when a dedicated cpufreq driver is introduced for krait cores
> that will correctly scale l2 cache with the core freq.
> 
> Opp-level is set based on the logic of
> 0: idle level
> 1: normal level
> 2: turbo level
> 
> Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> Tested-by: Jonathan McDowell <noodles@...th.li>
> ---
>  arch/arm/boot/dts/qcom-ipq8064.dtsi | 99 +++++++++++++++++++++++++++++
>  1 file changed, 99 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/qcom-ipq8064.dtsi b/arch/arm/boot/dts/qcom-ipq8064.dtsi
> index 7dd0b901cd30..a1079583def9 100644
> --- a/arch/arm/boot/dts/qcom-ipq8064.dtsi
> +++ b/arch/arm/boot/dts/qcom-ipq8064.dtsi
> @@ -48,6 +48,105 @@ L2: l2-cache {
>  		};
>  	};
>  
> +	opp_table_l2: opp_table_l2 {

Please don't use '_' in the node names.

> +		compatible = "operating-points-v2";
> +
> +		opp-384000000 {
> +			opp-hz = /bits/ 64 <384000000>;
> +			opp-microvolt = <1100000>;
> +			clock-latency-ns = <100000>;
> +			opp-level = <0>;
> +		};
> +
> +		opp-1000000000 {
> +			opp-hz = /bits/ 64 <1000000000>;
> +			opp-microvolt = <1100000>;
> +			clock-latency-ns = <100000>;
> +			opp-level = <1>;
> +		};
> +
> +		opp-1200000000 {
> +			opp-hz = /bits/ 64 <1200000000>;
> +			opp-microvolt = <1150000>;
> +			clock-latency-ns = <100000>;
> +			opp-level = <2>;
> +		};
> +	};
> +
> +	opp_table0: opp_table0 {

Perhaps you can name this opp-table-kryo, to make it consistent with
opp-table-l2 above?

Regards,
Bjorn

> +		compatible = "operating-points-v2-kryo-cpu";
> +		nvmem-cells = <&speedbin_efuse>;
> +
> +		/*
> +		 * Voltage thresholds are <target min max>
> +		 */
> +		opp-384000000 {
> +			opp-hz = /bits/ 64 <384000000>;
> +			opp-microvolt-speed0-pvs0-v0 = <1000000 950000 1050000>;
> +			opp-microvolt-speed0-pvs1-v0 = <925000 878750 971250>;
> +			opp-microvolt-speed0-pvs2-v0 = <875000 831250 918750>;
> +			opp-microvolt-speed0-pvs3-v0 = <800000 760000 840000>;
> +			opp-supported-hw = <0x1>;
> +			clock-latency-ns = <100000>;
> +			opp-level = <0>;
> +		};
> +
> +		opp-600000000 {
> +			opp-hz = /bits/ 64 <600000000>;
> +			opp-microvolt-speed0-pvs0-v0 = <1050000 997500 1102500>;
> +			opp-microvolt-speed0-pvs1-v0 = <975000 926250 1023750>;
> +			opp-microvolt-speed0-pvs2-v0 = <925000 878750 971250>;
> +			opp-microvolt-speed0-pvs3-v0 = <850000 807500 892500>;
> +			opp-supported-hw = <0x1>;
> +			clock-latency-ns = <100000>;
> +			opp-level = <1>;
> +		};
> +
> +		opp-800000000 {
> +			opp-hz = /bits/ 64 <800000000>;
> +			opp-microvolt-speed0-pvs0-v0 = <1100000 1045000 1155000>;
> +			opp-microvolt-speed0-pvs1-v0 = <1025000 973750 1076250>;
> +			opp-microvolt-speed0-pvs2-v0 = <995000 945250 1044750>;
> +			opp-microvolt-speed0-pvs3-v0 = <900000 855000 945000>;
> +			opp-supported-hw = <0x1>;
> +			clock-latency-ns = <100000>;
> +			opp-level = <1>;
> +		};
> +
> +		opp-1000000000 {
> +			opp-hz = /bits/ 64 <1000000000>;
> +			opp-microvolt-speed0-pvs0-v0 = <1150000 1092500 1207500>;
> +			opp-microvolt-speed0-pvs1-v0 = <1075000 1021250 1128750>;
> +			opp-microvolt-speed0-pvs2-v0 = <1025000 973750 1076250>;
> +			opp-microvolt-speed0-pvs3-v0 = <950000 902500 997500>;
> +			opp-supported-hw = <0x1>;
> +			clock-latency-ns = <100000>;
> +			opp-level = <1>;
> +		};
> +
> +		opp-1200000000 {
> +			opp-hz = /bits/ 64 <1200000000>;
> +			opp-microvolt-speed0-pvs0-v0 = <1200000 1140000 1260000>;
> +			opp-microvolt-speed0-pvs1-v0 = <1125000 1068750 1181250>;
> +			opp-microvolt-speed0-pvs2-v0 = <1075000 1021250 1128750>;
> +			opp-microvolt-speed0-pvs3-v0 = <1000000 950000 1050000>;
> +			opp-supported-hw = <0x1>;
> +			clock-latency-ns = <100000>;
> +			opp-level = <2>;
> +		};
> +
> +		opp-1400000000 {
> +			opp-hz = /bits/ 64 <1400000000>;
> +			opp-microvolt-speed0-pvs0-v0 = <1250000 1187500 1312500>;
> +			opp-microvolt-speed0-pvs1-v0 = <1175000 1116250 1233750>;
> +			opp-microvolt-speed0-pvs2-v0 = <1125000 1068750 1181250>;
> +			opp-microvolt-speed0-pvs3-v0 = <1050000 997500 1102500>;
> +			opp-supported-hw = <0x1>;
> +			clock-latency-ns = <100000>;
> +			opp-level = <2>;
> +		};
> +	};
> +
>  	thermal-zones {
>  		sensor0-thermal {
>  			polling-delay-passive = <0>;
> -- 
> 2.34.1
>